Editing Chlorofluorocarbon (section)

==Safety==
According to their material safety data sheets, CFCs and HCFCs are colorless, volatile, non-toxic liquids and gases with a faintly sweet ethereal odor. Overexposure at concentrations of 11% or more may cause dizziness, loss of concentration, central nervous system depression or [[cardiac arrhythmia]]. Vapors displace air and can cause asphyxiation in confined spaces. Dermal absorption of chlorofluorocarbons is possible, but low. The pulmonary uptake of inhaled chlorofluorocarbons occurs quickly with peak blood concentrations, occurring in as little as 15 seconds with steady concentrations, and evening out after 20 minutes. Absorption of orally ingested chlorofluorocarbons is 35 to 48 times lower compared to inhalation.<ref>{{cite book |doi=10.1016/B978-0-12-386454-3.01118-0 |chapter=Chlorofluorocarbons |title=Encyclopedia of Toxicology |date=2014 |last1=Tsai |first1=W.T. |pages=883–884 |isbn=978-0-12-386455-0 }}</ref> Although non-flammable, their combustion products include hydrofluoric acid and related species.<ref>[http://www.refrigerants.com/msds/r12.pdf Material Safety Data Sheet] {{webarchive|url=https://web.archive.org/web/20110208072612/http://refrigerants.com/msds/r12.pdf |date=2011-02-08 }}. National Refrigerants</ref>
Normal occupational exposure is rated at 0.07% and does not pose any serious health risks.<ref>{{cite web |last=WHO |title=Fully Halogenated Chlorofluorocarbons |url=http://www.inchem.org/documents/ehc/ehc/ehc113.htm#SectionNumber:1.8 |publisher=International Programme on Chemical Safety |url-status=live |archive-url=https://web.archive.org/web/20120505185051/http://inchem.org/documents/ehc/ehc/ehc113.htm#SectionNumber:1.8 |archive-date=2012-05-05 }}</ref>